Cloth-guiding devices



June 26, 1956 Filed Sept. 3, 1953 FIG.2.

P. LEVINE CLOTH-GUIDING DEVICES 5 Sheets-Sheet l INVENTORZ PAUL LEVINE,

' ATTORNEY June 26, 1956 P. LEVINE 2,752,151

CLOTH-GUIDING DEVICES Filed Sept. 3, 1953 5 Sheets-Sheet 2 FIG. 8. O ma2t June 26, 1956 P. LEVINE CLOTH-GUIDING DEVICES 5 Sheets-Sheet 3 FiledSept. 5. 1953 m m 8 8 H T 2% 6 4. m 5/ G v m l M F A 2 P 6 \6 w 4 We 6 4M w w 6 4 O m 2 8 O 7 m H 8 8 2 8 4 MB l 8 0M Q T, L M li. w 2 I B 1 m.+4 6 3 .13 2 OM 9| 9 2 l l. l 2 8 nd 0 l 2 G F June 26, 1956 P. LEVINE2,752,151

CLOTH-GUIDING DEVICES Filed Sept. 3, 1953 5 Sheets-Sheet 4 FIG.I3.

INVENTOR:

PAUL L EVlNE AYTOR N EY June 26, 1956 P. LEVINE CLOTH-GUIDING DEVICES 5Sheets-Sheet 5 Filed Sept. 5, 1953 FIG. I6. 320 l ilsse FIG. l9.

INVENTORI PAUL LEVINE,

FIG. l8.

ATTORNEY United States Patent 2,752,151 CLOTH-GUIDING DEVICES PaulLevine, Jamaica, N. Y. Application September 3, 1953, Serial No. 378,2804 Claims. (Cl. 2712.6)

This invention relates to cloth-guiding devices and has particularreference to a means attached to a conventional cloth-cutting machineand the like, for automatically maintaining a straight-line movement ofthe cloth flowing through the machine, particularly to and from thecutting knives thereof.

It is an object of this invention to provide a simple and comparativelyinexpensive mechanical attachment to maintain a straight-line movementof the cloth as it passes through the machine. Another object is toprovide ways and means for controlling shifting of the cloth as it getsout of line by shifting it bodily without producing any substantiallystretching effect on the cloth during the shifting of it. Another objectis to devise ways and means including the employment of photoelectriccells automatically to control the operation of sliding slats upon adrum in a cloth-guiding machine.

This invention actually is an improvement over the apparatus shown inthe patent to Meyer, No. 2,289,796, patented July 14, 1942. When thatmachine was de signed, it was sufiicient for a machine of that kind toguide cloth flowing at about yards per minute, whereas in these days,much more is necessary, namely, 100 yards per minute and more.Therefore, it is a major object of this invention to improve on theMeyer apparatus particularly in its quicker responsiveness to controlsboth as to mechanical lateral adjustability of the flowing cloth and asto the action of the photoelectric circuits.

The present invention accomplishes this control by pivotally attachingthe ends of the reciprocally sliding slats to adjustably inclinedparallel rim-like members that are rotatably mounted upon cam-facedsleeve elements fixed at opposite ends to a rockable shaft journalled inthe end frames of a cloth-cutting machine. The sleeve elements that arerockable with the shaft to which they are fixed are formed with inclinedinner cam surfaces and a boss extending therefrom, which providebearings for the aforementioned rim-like members.

An operating and setting arm projects from and is secured to one of thecam elements and in giving the operating and setting arm a partialupward or downward rockable movement, the angle of the plane of rotationof the inclined rim-like members rotating on the cam elements may bepivotally adjusted about a point lying at their center of rotation togive the sliding slats a right or left shifting motion to move theflowing cloth correspondingly to the right or left, as may be required.This action occurs when the edge of the cloth is too far to the right orto the left of the required cutting line and the cloth, in so movinglaterally, cuts light rays passing to photo-electric cells and therebyautomatically energizes or de-energizes one or both photoelectric-cells.This action, in turn, sets up currents (through relays) which, in turn,energizes or de-energizes certain solenoidcontrolled valves which inturn, direct compressed air to a cylinder and piston suitably attachedto the end frame of the cutting machine and at the same time adapted toopen or colse solenoid-actuated valves which control complementaryair-inlet and air-outlet valves connected to the cylinder. The outer endof the piston rod has pivotal connection with the aforesaid arm whichextends from the cam element upon one end of the drumv shaft.

The present invention discloses a method wherein dual 2,752,151 PatentedJune 26, 1956 photo-electric cells may be energized by means of a singlelight source or by adapting a separate light source for eachphoto-electric cell. This invention also shows an adaptation of a singlelight source whose light beam is split into two component light beams,each component light beam being directed to one of two photo-electriccells or to both simultaneously.

As this inventionmay be embodied in several forms without departing fromthe spirit or essential characteristics thereof, the present embodimentis therefore illustrative and not restrictive, since the scope of theinvention is defined by the appended claims rather than by thedescription preceding them, and all. changes that fall within the metesand bounds of the claims or that form their functional as well asconjointly co-operative equivalents, are therefore intended to beembraced by those claims.

Figure l is a front elevational view of a cloth-cutting machineembodying the features of this invention, and it shows parts brokenaway;

Fig. 2 is an enlarged fragmentary detail partly in section of one end ofa drum having sliding slats. The sectional portion is takenapproximately along line 22 of Fig. 3;

Fig. 3 is an end elevation of Fig. 2;

Fig. 4 is a transverse section of the drum and is taken along the brokenline 4-4 of Fig. 2;

Fig. 5 is an elevational view of the drum and sliding slats which aremounted upon the frame of the machine, a part of which is shown;

Fig. 6 is an enlarged fragmentary detail view showing the method ofattaching sliding slats to supporting slide rods upon the drum;

Fig. 7 is a fragmentary detail of the attachment means shown in Fig. 6;

Fig. 8 is a cross-section of same and is taken along line 83 of Fig. 6;

Fig. 9 is a schematic elevational view (in section) showing the path ofcloth passing through a cloth-cutting machine and shows the method ofattaching the present invention;

Fig. 10 is a diagrammatic view of the composite of three pairs ofelectric circuits between photo-electric cells and relays and solenoidsemployed in this invention and which embraces dual light sources;

Fig. 11 is a diagrammatic elevational view of the housing for thephoto-electric cells and light sources;

Fig. 12 shows only a single pair of the circuits of Fig. 10, extractedfrom the composite showing thereof, and indicates the circuits energizedduring one cycle of opieration but does not show the de-energizedcircuits;

Fig. 13 also shows a pair of circuits withdrawn from the compositeshowing in Fig. 10 and shows a second cycle of operation;

Fig. 14 is still another such circuit but showing a third stage;

Fig. 15 shows an electric circuit using dual photoelec tric cells butenergized by a single light source and will be hereinafter fullyexplained;

Fig. 16 is a schematic perspective view of an embodiment using a' singlelight source and dual photo-electric cells. Part of the walls are brokenaway to disclosethe interior;

Fig. 17 is a longitudinal sectional elevational view taken approximatelyalong line 1717 of Fig. 16;

Fig. 18 is a diagrammatic plan view showing the interior of the lowerbox portion of this embodiment, and shows two electric cells beingactivated by light beams;

Fig. 19 is a similar diagrammatic view but shows only one of thephoto-electric cells being activated;

Fig. ,20 is also a similar diagrammatic view but shows bothphoto-electric cells inactive; and f 3 Fig.2l is a diagrammatic planview of another embodiment which will be further and fully explained.

Referring now to the parts in detail wherein similar reference numeralsrefer .to similar parts throughout, 12 designates, in general, .aconventional cloth-cutting machine having end frames 14 and 16, a .base18 and cross- .plates 20 upon the end frames. Extending upwardly fromthetendframes are supporting members 22 having agroove orslot24 in whicha rotatable shaft 26 is slidably mounted. This shaft has secured theretoa core member 28 which functions as a pick-up .roll for winding the cutcloth after it "has been processed. The cloth C (Fig. 9) is fed to themachine over a guideroller .30; thence around 90 of a zdrum .32 which isformed peripherally with longitudinallysliding slats 34; thence upwardlyto and around .a guide roller 36; thence rearwardly to and over acutter- 2anvil 38.. From the cutter-anvil it passes under a driver orpuller roller 40 and from there it 'is wound around the pick-up roller28. The weight of the pick-up roller 28 against the driver roller 40provides sufiicient friction to impartrotation to .the pick-up rollerand as the cloth wound thereon, :the pick-up roller shaft 26 slides upin 7 the grooves 24.

Circular cutting knives 42 are rotatably mounted in short bars 44 whichare loosely mounted and weighted :to bring the cutting knives 42 intoforcible contact with the cloth to be cut. This is accomplished byfulcmming the bars 44 carrying the cutting knives (Fig. 9), by form- 8ing a V-cut 46 in the short end of the bar and engaging the V-cut underand against a cross-bar 48. The long :end50 of the bar 44 makes contactwith a free-moving pressure bar 52, which is pivoted at one end to acrossbar 54. The free end of the pressure bar 52 engages a spring :56for exerting pressure against same and the cutting .knives. A flatcross-bar 60 holds the upper end of the spring 56 in place and collars62 adjustable upon the cross-bar48 allow the cutters to be shifted alongthe anvilroller 38. Collars 64 are also provided 'to position thepressure bar upon the cross-rod 54, or align same with bars 52. In thedrawings (Fig. 1), three cutting knives are shown which will trim theedges and cut the cloth into two strips. providedif desired.

' The outer circumferential surface of the driver roller 40 and theouter surface of the sliding slats 34 may be covered with fine emerycloth, sand paper or other friction-surface material 70 and '72,respectively. Thus the contact of the cloth with the sliding slats .34will impart a rotary motion to the drum as the driver roller 40 im partsmovement .to-the cloth. To give rotarymovement to the driver roller 40,it is secured to a shaft 68 which has hearings in the end frames 14 and16 and the end thereof whichextends through the end frame .16 (Fig. .1),has secured thereto a sprocket wheel 74 which is connected by a linkchain 76 and 78, to ,a motor 80 for activating the cloth-cuttingmachine.

Referring to the component parts of the drum.32, these include .theslats 34 that are slidable upon slider rods 82 securely held uponspaced-apart disc-like annular plates 84 .(Fig. 2), that aremounted'rotatably upona rockable shaft 86 that has bearings in the endframes 14 and 16. The sliding slats 34 have secured to their bottom orinner sides short slide members 88 which are formed with oppositelydisposed lugs 90. These lugs 90 are formed at opposite .ends of theslides 88 and are provided 'with an orifice that slidably engages twoadjacent slider rods 82. The slides 88 are secured to the sliding slats34 by means of screws 92. The disc-like plates 84 may be held againstlongitudinal movement along the shaft 86 by means of a collar 94 (Fig.2), secured upon the shaft and engaging against the inner surfaceof theannular discs 84.

' .Referring'now to those elements which complete the drum 32 and whichform the essential features of this invention, 96 designates two sleevemembers each carrying a cam-face at its inboard :end so hereinafterthese However, additional cutters may be sleeve members will be referredto as cam members. One cam member is at each opposite end of therockable shaft 86 and secured thereto by a set screw 98. The inner orinboard cam faces of the cam members 96 are parallelly inclined as at100, as shown inFig. 2, and by dotted lines in Figs. 1 and 5. Projectinginwardly from these inclined surfaces are annular bosses 102 having anenlarged central orfice 104 through which the .shaft 86 passes. Theannular bosses 102 are suitably secured upon the cam members '96 bymeans of screws 106 and provide a bearing surface for roller or ballbearings 108. The inner rings of the bearings 10.8 are held upon thebosses by lips 110 while the rotatable outer ring of the bearings issecured to an annular rim-like member 112 having around its outerperiphery orifices or bores 114 in which pins 116 slidably engage. Theouter ends 118 of the pins 116 are flattened as at .118 and engage inslots 120 formed upon the ends of the sliding slats 34 :and pivotedtherein by pins 122 thus connecting the sliding slats .34 with the camassembly.

Normally, the cams 96'and the shaft 86 remain unitarilystationaryagainst rotation while the slats 34 and the rimlike members.112 are given ,a rotary motion by contact with a-moving cloth passingthrough the machine. At the same time if desired, the slats can be givena reciprocatory sliding motion parallel to the axis of the shaft 86through their end connections 122 with the rim-like members 112 withwhich the slats are rotating. This lateral sliding of the slats isaccomplished by movement upwardly of thexarm 124 on the cam member 96(dotted line posifion in Fig. 3 which moves not only the rockable shaft86 but thecam member 96 fixed to that shaft to aposition where theinclination of the inboard face of the cam member is reversed. 'Suchmovement of the cam .member carries with it conjoint movement of theboss 102, their roller bearings 108, and the rim-like member 112rotating thereon. So the inclination of the rim-like member 112 goesfrom one extreme as shown in full lines .in Fig. 2 when the swingablearm 124 is in its full line position as shown in Fig. 3, to the reversewhen the arm 1124 isin its dotted line position. Between those twoextreme positions, the rim-like members 112 take positions from slopingto the right as shown, through a vertical position, to sloping tothe'left. The rim-like member 112 at the left of the machine as shown inFig. 1 follows the same path as the right hand rim-like member becausethese two members are maintained parallel at all times, which is animportant feature of this invention. And these rim-like members arebridged by the sliding slats 34. These slats are made slidable by beingslidably supported by slides 88 slidable on rods v82 mounted cage-likein discs 84 fixed to shaft .86. Thus, a change in the angle ofinclination 100 of the plane .of rotation of the right hand rim-likemember 112 due to movement of arm 124, transmits the same change ofinclination of :the plane of rotation to the rim-like member 112 at theother side of the machine, and this change of inclination thereby givescontrolled sliding movement to the sliding slats 34. Thus, the change ofinclination of the plane in which the rim-like member rotates is alwaysabout a pivot point lying at the center of rotation. It is to be notedthat by the use of this invention, both cam members 96 and theirrotating rimlike members 112 are set parallel to each other in theirmounting on shaft 8.6, so that the cloth may be bodily moved laterallywithout stretching it. The arm 124 is secured by screws v126 to theouter or outboard end of one one of the outlets. By closing the upperair-inlet valve 134 and the lower air-outlet valve 140, and by openingthe lower air-inlet valve 136 and the upper outlet-valve 138, compressedair may enter through the lower air-inlet valve and cause the piston torise and force the cam arm 124 upwardly and thereby to turn the shaft 86and its attached cam members 96, which action will change the positionof pick-up and left-off of the cloth on the slats 34 because with thecam arm 124 in the upward position, the cloth contacts the drum at thepoint where the slats 34 are in the most right handed position and asthe drum is revolved, the cloth is carried to the left by the lateralmovement of the slats. Conversely or vice versa, by closing the lowerinlet valve 136 and the upper air-outlet valve 138, and opening valves134 and 140 compressed air may enter through the upper air-inlet valve134 and cause the piston to move downwardly. When, however, it isdesired to maintain the cam arm in a fixed position, both air-inletvalves are opened, while both air-outlet valves are closed. Compressedair then entering through both upper and lower inlet valves 134 and 136,equal air pressure will be exerted against both sides of the piston inthe cylinder 139 and the piston and connected cam arm will be heldimmovable. These various valve actions are automatically accomplished intheir proper order by the means set forth in this invention, and theywill now be described:

A box or cabinet 142 supported upon a bracket 144 which extends from andis attached to the end frame 16 (Figs. 1 and 9), is divided into fourcompartments, diagrammatically shown in Fig. 11 which has two lowercompartments 146 and 148, and two upper compartments 158 and 152. Curvedbracket arms 154 and 156 extend from the cabinet and carry lightreflecting units 158 and 160, respectively. Within the compartments 146and 152 there are mounted photo-electric cells 162 and 164,respectively, and in the compartments 148 and 150 there are mountedlight bulbs 166 and 168, respectively.

It will be observed that the arrangement of the photoelectric cells andthe light bulbs at light sources are arranged in the cabinet in off-setor staggered vertical alignment so that the light beam from the bulb inone compartment throws a light beam which is reflected toward thephoto-electric cell, slightly in advance of the light source from thesecond light chamber, with respect to the position of the edge of thecloth. Thus the edge of the cloth as it moves partly into the lightbeams, will intercept first one beam and by further movement interceptthe second light beam. Figure 11 best shows the staggered or off-setvertical alignment of the light bulbs and photo-electric cells. Figs.10, 12, 13 and 14 show the two light beams, in plan. When a light beam170 from the light source 166 is projected to the reflector 160, it isreflected along line 172 back to the photo-electric cell 164. (See Fig.10.) Similarly, when a light beam 174 from the light source 168 isprojected to the reflector 158, it is turned back or reflected alongline 176 to photo-electric cell 162. The photo-electric cell 162 haselectrical contact (not shown) with a relay switch 17 8, showndiagrammatically in the circuit diagrams, while the photo-electric cell164 has an electrical connection (not shown) with a second relay switch188. The complete relay switches being conventional, are not shown. Thearmature or switch arms 182 and 184, are however diagrammatically shownas are their contact points 186 and 188 for the relay 178 and contactpoints 190 and 192 for the relay 181). The two air-inlet valves 134 and136 are each provided with a solenoid attachment 194 and 196,respectively, and the two air-outlet valves are each provided with asolenoid attachment 198 and 200, respectively, all of which areenergized through circuits leading from an electric source andcontrolled by the photo-electric cells and their connected relayspandtheir sequence. of operation will now be described:

Fig. -shows a composite view of the three pairs of circuits while Fig.12 shows only a single pair of energized circuits without showing thede-energized circuits. Fig. 12 shows the position of the relays (seeswitch arms 182 and 184) that close two circuits, one of which energizesthe solenoid 198 to open the outlet valve 138 while a second circuitenergizes the relay 196 to open the inlet valve 136. The solenoids 194for the inlet valve 134 and the solenoid 200 for the outlet valve arenot energized and the electric circuits are not shown. When thesesolenoids are energized, the piston moves upwardly in the cylinder 130.In the next cycle, shown in Fig. 13, solenoids 194 for inlet valve 134are solenoid 196 for valve 136 are energized to open the respectivevalves 134 and 136, to direct air pressure to both sides of the pistonto hold it stationary. In the next cycle, Fig. 14, the solenoids 194 and260 open their respective valves 134 and 140, which drives the pistondownwardly. In Figs. 12, 13 and 14, valves and solenoid that have nocircuit connections normally remain closed.

Assuming now that the machine is in operation, the light sourcesilluminated and the cloth moving through the machine, the edge of thecloth C (Figs. 10 and 12) being free of the light beams and thus notinterfering with their rays and 174 to the reflector and back, rays 172and 176, to the photo-electric cells 164 and 162, respectively, theswitch arms 182 and 184, through the action of the energizedphoto-electric cells 162 and 164, engage the contact points 192 and 188,respectively. Considering the relay 178, the current flow is as follows:

From the electric source B through line 202, the contact point 188, line204 to solenoid 196, through solenoid to line 206 and back to source 13,thus energizing solenoid 196 to open valve 136, at the same time acurrent flow is directed from the electric source B through the line 208to contact point 192, line 218 to solenoid 198 to open valve 138,through solenoid to line 212 and back to source B The valves 134 and 140remain closed. With this setting compressed air enters through the openvalve 136 and drives the piston in the cylinder 130 upwardly. Thisaction, through its connection with the piston rod 128 will impart apartial rotation to the cam members 96 rotating the inclined rim-likemembers 112 and moving the slide slats to bring the edge of the cloth tothe right. While the circuits just mentioned are shown in the compositediagram of Fig. 10, they may be more easily followed by referring toFig. 12. The omitted circuits in Figs. 12, 13 and 14 are the inoperativecircuits with the settings shown. Valves and solenoids not shown incircuits in the figures mentioned, remain closed.

When the edge of the cloth C has moved to the right and to the positionshown in Fig. 13, it cuts off the light beam 174 emanating from thelight source 168 and deenergizes the photo-electric cell 162. When theedge of the cloth has moved thus far to the right, it has reached theestablished point for a straight-line cut and the circuits that becomeoperative are as follows: The circuit lines to the valve 136 whichremains open are similar to those shown in Fig. 12, the switch arm 182of the relay remaining closed. The switch arm 184 of the relay 180,however, has been released and has made contact with the contact pointto close a circuit which leads from the electric source B1 through line218 through switch arm 184 to contact point 190, through line 218 tosolenoid 194 of valve 134, through solenoid and line 220 back toelectric source B thereby opening the valve 134. At this stage thevalves 138 and 140 are closed and compressed air is allowed to enterthrough the upper and lower inlet valves 134 and 136 and exert pressureto both sides of the piston in the cylinder 130 and hold the cloth inthe position shown, thereby making straightline cuts in the cloth.

Fig. l4 shows the end of the cloth C further advanced toward the rightand intercepting the direct beam 174 and the reflected beam 172, therebyde-energizing both photo-electric cells which releases both switch arms182 and 184 and establishes current flowto the solenoids 194 7 13. Thedirect light beam 174 and the reflected light beam 172 are spaced apart,at a distance of approximately one-fourth an inch and when the edge ofthe cloth C,

reaches approximately half way into this space, the straight-line cut isestablished and maintained by the set-up shown in Fig. 13.

Fig. 15 shows an embodiment in which a single light source 222 impingeslight beams upon two photo-electric cells 162' and 164, which, in turn,are energized or deenergized in accordance with the movement of the edgeof theclo'th into or out-of the path of the light beams. In this view,the end of the cloth C is shown in full lines, its middle position beingshown by the dotted line C and its farthest right position by dash lineC With the cloth edge to the left of the light beams the switch arms182' and 184' are set as shown by the full lines. A circuit is thenestablished which leads from the electric source 'B through the switcharm 184' to the line 210', to the solenoid 198, through the solenoid toline 212' back to the electric source B thereby opening outlet :valve138. A second circuit leads from the electric source B through theswitch arm 182' (shown in full line) to line 204 through solenoid 196into line 296' back to current source B thereby opening inlet valve 136,thus driving the piston upwardly. In the next stage (similar to thatshown in Fig. 13), the circuit through V the switch arm 182' and thesolenoid 196 to open the inlet valve 136', remains the same. The arm184', however, being released by the de-energized photo-electric cell164', drops to the position shown by the dotted line and a circuit isthen established which leads from the source B through the switch arm184' (which has dropped to the position shown by the dotted line), toline 218, through solenoid 194' to line 212 back to current source Bthereby opening inlet valve 134'. This set-up holds the piston stationay, as is accomplished in the set-up shown in Fig. 13. The final stage,when the cloth cuts ofi both light beams, the switch arm 182' also dropsto the position shown by a dotted line and sets up a current flow fromthe source B to the line 224, to solenoid 200, through solenoid tobranch line 206 into 206' back to current source B thus opening valves194 and 200' and driving the piston downwardly.

Attention is now directed to Figs. 16 to 21, inclusive, which show amodified form embracing the principle of this invention and comprises abox or housing 310 containing a pair of photo-electric cells 312 and314. The.

front wall of the housing is formed with an orifice 316. Aligned withthis orifice there is mounted upon the rear Wall of the housing a convexreflecting lens 318 designed to 'andadapted'to split a single light beamwhich impinges upon it, into two component light beams and reflect thetwo beams in different directions as we shall further on explain.

Attached to the top of the housing 310 and tilted for ward at -a slightangle, there is a second smaller housing 320 within which there ismounted a single light bulb 322 backed by a reflector 324. An orifice326 is provided in the front wall of the small housing 320 and isaligned with the light bulb 322 and the reflector 324 behind it.Projecting from one side of the large housing 310, there is a bracketarm 323 which carlies upon its outer face end a reflector element 330which is aligned with the orifice 316 and convex reflector 318 in thelarge housing 310. A light beam 332 emanating from the light source 322and projecting through orifice 326 (which may be provided with acondenser lens 350) is impinged upon a the reflector 330, from thereprojected in a pencil type of light beam 334, through -the orifice 31,6and into the large housing 310 to strike the convex lens-reflector element 318 where-it is split into two component light beams 334' and 334"{Big 18) Partition members 336 and Fig. 18 shows the'edge of thecloth Cdrawn away from.

the light beam 334 which is free, in its entirety, to project to theconvex lens reflector 318 where it is split into two reflected beams334' and 334" and energizes both photo-electric cells 312 and 314. Fig.l9 shows the edge of the cloth C partly obstructing the light beam 334,allowing approximately one-half 334 of same to project to the convexlens reflector 318 and from there project the half beam 334 to thephoto-electric cell 312. Fig. 20 shows the cloth C intercepting the fulllight 'beam334 and shows both photo-electric cells de-energized. Withthis modified light-beam controlling means, the same circuits andcircuit controls to the solenoids and connected valves, as alreadydescribed, may be set up.

in Fig. 21, there is shown a variation wherein the convex lens reflectoris -substituted by a mirror reflector unit which comprises a pair ofangularly arranged mirror plates 338 and 344). The photo-electric cells312 and '314 in this form are entirely enclosed in separate compartments342 and 344 formed'by partitions 346 and 348, provided with orifices inwhich lens 351 and352 may be mounted. Another feature of theselight-reflecting units is that since the light beams 332 and 334 are invertical alignment, the cloth will out both beams at the same timethereby giving a greater variation of the amount of light impinging onthe photo-electric cells so that an open weave cloth or web may beguided.

In Fig. 9 flexible conduits carrying the various circuit lines are showndiagrammatically superimposed upon the figure and flexible air tubes(not shown) are supplied to direct compressed air to the cylinderassembly.

I claim:

1. In a cloth-guiding devicehaving a roller on which cloth is to bewound into 'a roll, (and means for guiding the cloth flowing thereto ina laterally straight path including cloth-shifting means having arotatable drum with reciprocally sliding slats on its periphery wherebythe drum and the slats are rotated unitarily by the cloth passingtherearound; the improvement comprising a rockable shaft from which thedrum is rotatably supported, a cam-faced sleeve member fixed to therockable shaft at each end thereof with each cam-face facing inwardly,an annular rim member rotatably supported from each sleeve'and to whichthe slats are pivotally fastened, and automatic means for pivotallychanging the plane in which the rim members rotate about a point lyingat their center of rotation by rockably adjusting the shaft with thecam-faced sleeve'members fixed thereto while the rim members arerotating thereon.

2. Apparatus according to claim ,1, with the addition of a bossextending from the cam-face of each sleeve means about which the rimmember rotates.

3. Apparatus according to claim 1, with the addition .of arm meansextending from at least one of the sleeve members through which therockable shaft is adjusted for changing the plane of rotation of both:rim members.

4. Apparatus according to claim 1, withthefaddition of arm meansextending fromone of thesleeve members through which the rockable shaftis adjusted for changing the plane of rotation of both rimmembers,hydraulic means for controlling the position of the arm means, andphoto-electric cell means for regulating operation of the hydraulicmeans.

References Cited in the file of this patent UNITED STATES PATENTS2,082,634 Johnstone June 1, 1937 2,195,006 Gulliksen Mar. 26, 19402,312,182 Meyer Feb. ,23, 1943 2,332,104 Meyer n- Oct. 19,- .19432,451,343 Oct. 12,4948,

